Know thyself
This is the best integration of exercising the mind, body, and soul. Cultivating ones own life force energy, (Qi, Chi, or Prana) to live a longer and stronger life. The practice starts with physical exercise, going into meditation, and ending with a self body massage (organ cleansing).
Learn to see with the mind's eye. Like any muscle , the more you use it, the stronger it gets. Through training and meditation with the eye's closed, you learn to focus the minds eye and see into the darkness.
After 20 years of physical exercise across many frameworks, training with teachers in 3 different continents, I have discovered this method of Emei style medical qigong that delivers vibrant health through the body by cultivating and channeling energy through the meridian system.